Strong laser treatment worsens melasma — the shocking regret of people who underwent treatment unknowingly.
"I apply sunscreen every day without fail, but the hazy spots on my cheeks won't disappear at all..." Are you worried about this? In fact, the treatment methods for regular spots and melasma are 180 degrees different, and self-care judgment can backfire. This article clearly explains the following 5 key points, up to the latest treatment strategy boasting a maximum 64% improvement rate.
- The decisive difference between melasma and regular spots
- Why some people are refused laser treatment at clinics
- The surprising improvement rate of tranexamic acid oral intake and the correct duration of use
- The effectiveness of laser toning and important limitations to know
- Latest combination strategy of picosecond laser × tranexamic acid
What is melasma — how does it differ from regular spots?
Melasma (kanpan) is a hazy, blurred-boundary spot that appears symmetrically around the cheekbones. The greatest characteristic is,"Treatment methods for regular spots (age spots) and melasma are 180 degrees different"In contrast, while regular spots form locally due to accumulated UV damage, melasma develops through the complex interplay of three factors: "excessive activation of melanocytes (pigment cells)," "ultraviolet rays," and "female hormones (estrogen)."
Why is it overwhelmingly common in women in their 30s and 40s? This is because fluctuations in female hormones due to pregnancy, childbirth, oral contraceptive use, or age-related changes keep the skin's melanocytes in a constant state of stimulation, creating a "hypersensitive state" where they produce excessive melanin. If you fail to understand this fundamental difference in mechanism and treat it as just a regular spot by applying strong stimulation, melasma can darken rapidly.
Is it true that "laser treatment worsens it" — the reality of reactive melanin proliferation
Did you know the reason for"why some people are refused laser treatment at clinics?"It is because applying a general high-power laser carelessly to melasma triggers "reactive melanin proliferation (PIH: post-inflammatory hyperpigmentation)," risking that the spot becomes pitch-black and worsens instead.
Since the skin with melasma has melanocytes in an excited state, applying strong thermal damage with high-power lasers (Q-switched ruby lasers or ablative lasers, etc.) triggers the inflammation to activate a "melanin proliferation cascade (chain reaction)." Therefore, in melasma treatment, "high-power lasers that cause thermal damage" are contraindicated (dangerous lasers), and one must carefully choose safe lasers such as "low-power lasers" that do not stimulate melanocytes, or "picosecond lasers" that destroy pigment with shock waves rather than heat.
The effectiveness of tranexamic acid — does it work just by taking it? Oral intake evidence
The foundation of melasma treatment is oral tranexamic acid intake. Tranexamic acid works by blocking a substance called "plasmin," which gives the order to produce melanin, fundamentally suppressing spot generation.
The effectiveness is also demonstrated by actual research data, and according to the Han et al. study (2024, Scientific Reports), combining oral tranexamic acid (500 mg per day) with external medication for 2 months resulted in a melasma severity score (mMASI) improvement of an average of64.1% dramatic improvementwhen reported. By combining oral intake with external medication alone, a powerful effect can be expected in suppressing melanocyte runaway from within the body.
However, tranexamic acid has the action of making blood clot more easily, so caution is needed for those with thrombosis risk. Also, regarding "how long it should be taken continuously," the same study found that stopping oral intake results in melasma recurrence (regression) in approximately 6 weeks to 2 months in many cases. Therefore, after taking it for a certain period to calm down melasma, it is recommended to continue some form of maintenance therapy under physician guidance.
The effectiveness and limitations of laser toning (low-power 1064nm)
While suppressing melanocyte excitement with tranexamic acid, "laser toning" gradually expels melanin that has already accumulated in the skin. This is the principle of irradiating 1064nm Q-switched Nd:YAG laser at an extremely low output level (subthermally damaging level) to micro-destruct only accumulated pigment without stimulating melanocytes.
According to a study by Zhou et al. (2024, Lasers in Surgery and Medicine), laser toning treatment with Q-switched Nd:YAG laser confirmed significant improvement in melasma severity at 6 months post-treatment. The reason it absolutely must be low-power is, as previously mentioned, to prevent inflammation caused by heat from high-power output.
However, this treatment has limitations. In the 2-year long-term follow-up of the same study,58.8% of patients experienced melasma recurrence or worseningwas observed. Laser toning is effective at temporarily reducing melanin, but it has the limitation that it does not completely eliminate the root causes (hormones and inflammation), resulting in a high risk of recurrence.
The Strongest Combination — Picosecond Laser × Tranexamic Acid: The Latest Strategy
The most cutting-edge strategy currently attracting attention is the combination of "oral tranexamic acid" and "picosecond laser." Picosecond lasers deliver light pulses in "picoseconds (one trillionth of a second)," which is significantly shorter than conventional nanosecond lasers. This minimizes thermal damage (photothermal effect) while allowing the shock waves (photoacoustic effect) to pulverize melanin into fine particles—a major strength.
In the latest research by Lin et al. (2026, European Journal of Medical Research), the group treated facial pigmentation with a 730-nm picosecond laser and demonstrateda 56% improvement rate,which was significantly higher than the conventional Q-switched Nd:YAG laser (38% improvement rate) and showed fewer adverse effects (such as less erythema).
Recommended Protocol Example:First, initiate oral tranexamic acid to effectively calm down melanocyte overactivity. Afterward, safely destroy and eliminate melanin using a picosecond laser with minimal thermal damage, and continue oral tranexamic acid after treatment along with maintenance therapy (regular gentle care) for recurrence prevention. This strategy represents the current "strongest melasma treatment."
"I wonder if this applies to my case?"
Book a free consultation
We do not employ high-pressure sales. Please feel free to contact us.
Summary
- Melasma is a special type of pigmentation caused by factors such as female hormones, and conventional pigmentation treatment (high-power laser) is contraindicated as it can worsen the condition.
- Oral tranexamic acid is the cornerstone of melasma treatment with approximately 64% improvement rate, but recurrence prevention after discontinuation is essential.
- Laser toning is effective in the short term, but carries a long-term recurrence risk (approximately 59%), limiting its effectiveness as a standalone treatment.
- The latest picosecond laser demonstrates a 56% improvement rate surpassing conventional lasers and high safety, making its combination with oral tranexamic acid the current optimal solution.
If you are wondering "Is my pigmentation melasma?" or "previous treatments haven't worked," achieving clear, radiant skin is entirely possible with the correct combination treatment tailored to your individual skin condition. Before worsening your skin through incorrect care, please feel free to consult with us.
References
- Han, H. J., et al. (2024). Targeting the dermis for melasma maintenance treatment. Scientific Reports.
- Zhou, Y., et al. (2024). Comparison of 755-nm picosecond alexandrite laser versus 1064-nm Q-switched Nd:YAG laser for melasma: A randomized, split-face controlled, 2-year follow-up study. Lasers in Surgery and Medicine.
- Lin, G., et al. (2026). Comparing the efficacy and safety of a 730-nm picosecond laser with a 532-nm Q-switched Nd:YAG laser for facial pigmented disorders: a retrospective comparative study. European Journal of Medical Research.
About the author of this article
Hiromistu NakamuraPhysician
Zetith Beauty Clinic Ginza, Osaka, Fukuoka
With a track record of research presentations at domestic and international academic conferences, he is involved in technical guidance and education across Zetith Beauty Clinic. He specializes in precision procedures based on anatomical principles and pursues natural-looking results tailored to each individual's skin condition.